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fetch_request.go
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fetch_request.go
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package sarama
type fetchRequestBlock struct {
fetchOffset int64
maxBytes int32
}
func (f *fetchRequestBlock) encode(pe packetEncoder) error {
pe.putInt64(f.fetchOffset)
pe.putInt32(f.maxBytes)
return nil
}
func (f *fetchRequestBlock) decode(pd packetDecoder) (err error) {
if f.fetchOffset, err = pd.getInt64(); err != nil {
return err
}
if f.maxBytes, err = pd.getInt32(); err != nil {
return err
}
return nil
}
type FetchRequest struct {
MaxWaitTime int32
MinBytes int32
blocks map[string]map[int32]*fetchRequestBlock
}
func (f *FetchRequest) encode(pe packetEncoder) (err error) {
pe.putInt32(-1) // replica ID is always -1 for clients
pe.putInt32(f.MaxWaitTime)
pe.putInt32(f.MinBytes)
err = pe.putArrayLength(len(f.blocks))
if err != nil {
return err
}
for topic, blocks := range f.blocks {
err = pe.putString(topic)
if err != nil {
return err
}
err = pe.putArrayLength(len(blocks))
if err != nil {
return err
}
for partition, block := range blocks {
pe.putInt32(partition)
err = block.encode(pe)
if err != nil {
return err
}
}
}
return nil
}
func (f *FetchRequest) decode(pd packetDecoder) (err error) {
if _, err = pd.getInt32(); err != nil {
return err
}
if f.MaxWaitTime, err = pd.getInt32(); err != nil {
return err
}
if f.MinBytes, err = pd.getInt32(); err != nil {
return err
}
topicCount, err := pd.getArrayLength()
if err != nil {
return err
}
if topicCount == 0 {
return nil
}
f.blocks = make(map[string]map[int32]*fetchRequestBlock)
for i := 0; i < topicCount; i++ {
topic, err := pd.getString()
if err != nil {
return err
}
partitionCount, err := pd.getArrayLength()
if err != nil {
return err
}
f.blocks[topic] = make(map[int32]*fetchRequestBlock)
for j := 0; j < partitionCount; j++ {
partition, err := pd.getInt32()
if err != nil {
return err
}
fetchBlock := &fetchRequestBlock{}
if err = fetchBlock.decode(pd); err != nil {
return nil
}
f.blocks[topic][partition] = fetchBlock
}
}
return nil
}
func (f *FetchRequest) key() int16 {
return 1
}
func (f *FetchRequest) version() int16 {
return 0
}
func (f *FetchRequest) AddBlock(topic string, partitionID int32, fetchOffset int64, maxBytes int32) {
if f.blocks == nil {
f.blocks = make(map[string]map[int32]*fetchRequestBlock)
}
if f.blocks[topic] == nil {
f.blocks[topic] = make(map[int32]*fetchRequestBlock)
}
tmp := new(fetchRequestBlock)
tmp.maxBytes = maxBytes
tmp.fetchOffset = fetchOffset
f.blocks[topic][partitionID] = tmp
}